The rulings against the levies in two federal courts – the U.S. Court of International Trade and the U.S. District Court in Washington, D.C. -- centered on Trump's unprecedented invocation of the International Economic Emergency Powers Act as a legal justification for tariffs.

President Donald Trump returned to the White House in January determined to overturn decades of American policy and build a tariff wall around a U.S. economy that used to be pretty much wide open to f

The U.S. Court blocks Trump-era tariffs, sparking market and trade uncertainty. Click here for my look at the implications for the economy and the markets.

The larger legal battle between Harvard and the Trump administration could raise questions of retaliation versus executive authority.

Trump’s comments come after a federal judge blocked the Trump administration's effort to bar the university from enrolling international students.